Fig 1.

Targeted sagittal MIP reconstructed image of a TR MRA dataset obtained during early arterial phase (A) shows minimal venous filling of right sigmoid sinus (black arrow) in a patient with a low flow DAVF (type 1). The corresponding lateral DSA image with a right common carotid artery injection (B) demonstrates the fistula with mild early filling of right sigmoid sinus (black arrow) that is surrounded by a network of small feeding artery branches from the right occipital artery and middle meningeal artery (white arrowheads). This fistula was missed on 3D TOF MRA images.